GOLD

A bad input to the Ariane 5 rocket’s guidance system that was missed during pre-launch quality control checks caused the launcher to deviate from its expected flight path and place two commercial communications satellites in the wrong orbit Jan. 25, Arianespace announced Friday.

An Ariane 5 rocket soared into orbit from French Guiana on Jan. 25 with the commercial SES 14 and Al Yah 3 communications satellite, but the launcher missed its mark and released the telecom craft into an unplanned orbit.

Arianespace will convene an independent inquiry board chaired by a top European Space Agency official to investigate why an Ariane 5 rocket flew off course Thursday night after liftoff from French Guiana with the SES 14 and Al Yah 3 telecom satellites, but both payloads will be salvaged to accomplish their planned missions, officials said Friday.

A European Ariane 5 rocket took off from French Guiana and delivered two commercial communications satellites and a NASA scientific package to orbit Thursday after an unexpected radio blackout raised worries that the mission failed. But questions lingered early Friday about the accuracy of the payload deployments.

Arianespace chief executive Stephane Israel announced an anomaly occurred during Thursday’s flight of an Ariane 5 rocket from Kourou, French Guiana, shortly after the launcher’s second stage engine ignited.

A $66 million NASA-funded science sensor package bolted on to a commercial communications satellite is ready for a ride toward a 22,000-mile-high orbital perch Thursday on a European Ariane 5 rocket, commencing a two-year mission surveying a rarely-studied region of Earth’s upper atmosphere.

A European Ariane 5 rocket delivered two commercial communications satellites to orbit Thursday after Arianespace’s ground team lost telemetry from the launcher during its climb into orbit, raising concerns that the mission might have failed. The SES 14 and Al Yah 3 satellites are confirmed in orbit and healthy, but the parameters of their orbits are unknown. Both were heading toward 22,000-mile-high geostationary perches over the equator.

The first Ariane 5 rocket scheduled for launch in 2018 has been topped off with two communications satellites for SES and Yahsat, moving the European booster closer to liftoff Thursday from a tropical launch pad in French Guiana with payloads to serve commercial and scientific missions.